all Data Listed by tengu Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

On January 31, 2026, the ransomware group tengu listed an organization called all Data on its leak site and stated that internal files had been taken during a ransomware operation. The number of individuals whose information may be involved remains unknown, as does any confirmation that the files have been published or sold. The incident is one of many recent claims by ransomware operators targeting organizations that hold records on behalf of other entities.

Inside the incident

The only confirmed detail is the January 31, 2026 listing itself. The group claims internal files were exfiltrated; no file counts, sample contents, or timelines for the intrusion have been released by either the operator or the listed organization. It is not known whether encryption was also deployed or whether any ransom demand was communicated.

Who is tengu?

Tengu is a ransomware group that has appeared on leak sites in multiple incidents since 2024. Public reporting describes the group using double-extortion tactics, in which data is copied before encryption and then threatened with disclosure if payment is not made. The group maintains a site where it lists victims and, in some cases, posts excerpts of stolen material. Its listings are treated as unverified claims until corroborated by the affected organization or independent investigation.

Who is all Data?

All Data appears to be an organization whose operations intersect with multiple companies and institutions, including Tahkout Group, skyegtours.com, KSP, TLM Indonesia, Compagnie Foncière Parisienne, lenotech.com.ph, Jakarta Nanyang School, and namico.go.ke. Entities of this type commonly manage or process records for clients across travel, education, real estate, and government-related sectors. A breach at such an organization can therefore affect data belonging to third parties rather than only its own employees or direct customers.

What was likely exposed

The listing refers only to “internal files.” No further breakdown of file categories or data fields has been supplied. Organizations that handle records for multiple clients routinely store contact details, account information, operational documents, and correspondence; however, the precise contents in this case remain unconfirmed.

Why it matters

When internal files from a data-handling organization are taken, the records of other entities can be placed at risk even if those entities were not themselves breached. Individuals connected to the listed companies may face follow-on fraud, phishing, or account-takeover attempts if their details appear in the material. The organization itself faces regulatory scrutiny and potential loss of client trust regardless of whether the files are ultimately published.

What to do if you're exposed

Monitor accounts for unusual login attempts and enable multi-factor authentication where available. Review bank and credit statements regularly for unauthorized activity. Place fraud alerts with major credit bureaus if financial identifiers are suspected to be involved. Readers can run a free exposure scan of their email address against known breach data to check for prior appearances of their information.

• Change passwords for any accounts that reuse credentials found in past incidents.
• Request copies of personal data held by organizations listed in the incident if you have an existing relationship with them.
• Remain alert for unsolicited messages that reference the affected companies.

AICompiled with AI assistance from public sources and published under our editorial standards.